diff --git a/pttodoest/src/main.rs b/pttodoest/src/main.rs
index 001167a..9f4e818 100755
--- a/pttodoest/src/main.rs
+++ b/pttodoest/src/main.rs
@@ -111,8 +111,18 @@ mod test_flags {
     }
 }
 
-fn add(files: Vec<String>, add: String, add_schedule: Option<String>) -> Result<(), String> {
-    Err("not impl".to_string())
+fn add(files: Vec<String>, added: String, add_schedule: Option<String>) -> Result<(), String> {
+    let task = match add_schedule.clone() {
+        None => serde_yaml::Value::String(added),
+        Some(add_schedule) => {
+            let mut m = serde_yaml::Mapping::new();
+            m.insert("schedule".into(), add_schedule.into());
+            m.insert("do".into(), added.into());
+            serde_yaml::Value::Mapping(m)
+        }
+    };
+
+    panic!("append {:?} to {:?}", &task, &files);
 }
 
 fn reconcile(files: Vec<String>) -> Result<(), String> {